Waterproof fuse-cap.



Patented Oct. 6, 1908.

WITNESSES ATTORNEYS UNITED STATES PATENT ()l iFlCE.

THOMAS \l. DANIELS, Ol VALDEZ, lHS'lllltl'l Oh ALAShA.

warnnrnoor FUSE-CAP.

To all 207mm it ma i concern:

lie it known that I. THOMAS M. DANIELS, a citizen of the lTnitedStates,and a resident of Valdez, District of Alaska, have invented a new andImproved \Vate'rpr'oof Fuse-Cap, of which the following is a full clear,and exact description. i

This invention relates to fuse caps such as used for attaching anexplosive cartridge to the end of -a fuse, which cartridge-is to be usedin blasting in mining. V

The object of the invention is to produce a fuse cap of simpleconstruction, which can be readily attached to the end of the fuse, andwhich will be substantially water-tight. The general purpose of theinvention is to prevent the occurrence of miss-fires or miss-holes inblasting, which are due largely to the fact that the explosive in thecartri ge becomes wet. Such failures to'explode are the direct cause ofmany mine accidents.

The invention consists in the construction and combination of parts tobe more fully described hereinafter and particularly set forth in theclaims.

Reference is to be had to the accompanying drawings forming a part ofthis specification, in which similar characters of referenceindicate'corresponding parts in all the Figure 1 is a sideelevationof'the end of a fuse having a fuse cap constructed according tomy invention; Fig. 2 is a view similar to Fig. 1, but showing the innerend of the fuse cap broken away and shown in cross section; this'viewshows the fuse cap in the act of being appliedtothe fuse; Fig. 3 is avertical section-through a portion. of the fuse and the inner end of thecap, and showing the cap clamped to the fuse; Fig.4 is an end view ofthe cap in its closed or clamped condition, the fuse being omitted; andFig. 5. is a perspective showing a'portion of the forward edge or innerend of the fuse cap, and showing especially the manner .of forming themeans for securing the cap to the fuse.

Referring more particularly to the parts, 1' represents the end of thefuse to which the fuse cap 2 is attached. This cap consists of a tube orcylinderprovided at its open end with a plurality of longitudinallydisposed slits 4:. The inner end of the cap, that is, the end having theslits 4-, is turned outwardly so as-to form a crimp or crimped edge 5,as indicated most Specification of Letters Patent. Application filed.March 11, 1908.

3 closed at one end, and

Patented Oct. 6, 1908.

Serial No. 420,388.

-- clearly in Fig. Before turning the edge in this manner,- a part ofthe material of the crimped portion is struck inwardly so as to form aplurality of inwardly projecting I spurs or teeth (3. By reason of theslits L the inner end of the cap formed into a plurality of sections orleaves 7, and these leaves are slightly bent outwardly so that by theirown resiliencythey tend to hold themselves in the outwardly inclinedcondition illustrated in Fig. 2.

On the cap there is mounted aflsliding ring or clamping ring 8. Inapplying the tube or shell 3' to a fuse, I slip over the end .of thefuse a sleeve 9, of rubber or similar material, which sleeve isconsiderably longer than the length of the slits 4'. as indicated inFig. 2. The cap containing the cartridge is then slipped over the end ofthe fuse with the inner end sleeve 9. The clamping ring 8 is then forcedto the inner end of the sleeve so that. it

presses the leaves 7 inwardly and clamps them against the sleeve 9.Forcing the leaves 7 inwardly in this manner presses the spurs 6 throughthe sleeve covering of the'fuse 1. In this way the cap becomes firmlyattached to the body of the fuse.

A fuse constructed as described is substantially water-tight, as thesleeve 9" between the body of tube 3. The crimp the interior of the capor limit the forward o"operates as a stop to 9 and into the outer of thefuse disposed at the w movement of the ring 8, and when the ring seatsitself against this crimp, the tube or shell 3 will have become tightlyattached to thefuse, as will be readily understood.

Having thus described my invention, claim as new and desire to secure byLetters Patent: I

1. A fuse cap having a cylindrical shell adaptedto contain an explosivecartridge, closed at one end and open at the other end the open endhaving longitudinally disposer slits dividing the inner end of saidshell into sections, and "leans for clamping said sections inwardly upon'the end of the fuse extending into said shell.

2. A fuse cap consisting of a'cylindrical shell closed at'one end andopen at the other 7 end, the open end having longitudinally disadaptedto force said spurs inwardly to clamp said shell upon the fuse.

3. A'fuse cap consisting of a shell having an open end and slits in theWall thereof ex tending longitudinally at said open end, a sliding ringon said shell adapted to clamp the slit portion of said shell upon thefuse passing into said shell, and a sleeve of Waterproofing materialdisposed between said shell and the fuse and disposed under said slits,said sleeve affording means for excluding Water from the interior ofsaid shell.

4. A fuse cap consisting of a cylindrical shell having a split open endreceiving the fuse, said open end having spurs formed thereuponprojecting inwardly, a clamping ring sliding on said shell and adaptedto clamp said spurs upon a fuse extending into said shell, and a sleeveof waterproofing material adapted to surround the fuse and having agreater length than the split portion of said shell, whereby said sleeveexcludes Water from the interior of said shell.

5. A fuse cap having an open end With a crimped edge, said open endhaving longitudinal slits formed therein and spurs projecting inwardly,and a sliding sleeve on said shell adapted to force said spurs inwardlyto clamp said cap upon the fuse;

In testimony whereof I have signed my name to this specification in thepresence of two subscribing Witnesses.

THOMAS M. DANIELS.

Witnesses W. '1. Basics, 0. AJVnLLs.

